I have to say the 5 Star tune (92 perf) using the BullyDog interface has been money for me. Started out with a lag between 2nd and 3rd but now it is smooth and fast. Best 0-60 is 4.61s (using OBDLink , not Dragy) and I don't know what the hell I am doing on launch. All stock...except for the vinyl overlays.